Explosion-engine



T. D. ROBINSON.

EXPLOSION ENGINE.

APPLICATION FILED NOV. 11, 1918.

1 55,428, Patented Oct. 12 1920.

2 SHEETS--SHEET 1.

HIS ATTURNEJY T. D. ROBINSON.

EXPLOSION ENGINE.

APPLICATION FILED NOV. 11, 1918.

1 355,428. Patented Oct. 12, 1920.

2 SHEETS-SHEET 2.

INVENTDB,

HIS ATTUBNEY.

- Engines, of which UNITED STATES THEODORE D. ROBINSON, 015 LOS ANGELES; CALIFORNIA.

EXPLOSION-ENGINE.

Specification of Letters Patent.

Patented Oct. 12, 1920.

Application filed November 11, 1918. Serial No. 261,974.

T 0 all whom it may concern.

Be it known that I, THEODORE D. ROBIN- SON, a citizen of the If at the cit of Los Angeles, county of Los Angeles, gtate of California, have invented new and useful Improvements in Explosionthe following is a specification.

The object of my invention is to produce an engine in which the explosion is balanced and which is capable of greater speed and power than is possible with the explosion engines in common use.

In the drawings forming a part of this application F Figure 1 is a section on the line 1-1 of ig. 2 is a fragmental front elevation of a cylinder.

Fig. 3 is a horizontal cross-section through the ports of the valve and cylinder.

F 1g. 4 is a horizontal cross-section below the valves.

Fig. 5 is a horizontal the valves.

Referring to the drawings, 10 is the frame of my engine in which is mounted the crank shaft 11, having any desired number 'of cranks 12. In the frame are any desired number of cylinders 13 which are mounted to reciprocate. These cylinders, only one of which is shown, are connected to the cranks of the crank shaft by pitmen or connecting rods 14 of which there are preferably one on each side of each cylinder, making two for eaclci c linder, although only one may be use cross-section above connecting rod 16 with a crank of the crank shaft. Each cylinder and its piston is so connected with the cranks of the crank shaft that when the explosion takes place in the cylinder the explosion forces the cylinder to move outwardly and the piston to move inwardly at the same time, and the cylinder pulls on the crank or cranks with which it is connected, and the. piston pushes on the crank with which it is connected, whereby the full force of the explosion is imparted to drive the crank shaft at a point much farther'removed from the dead center than is the case with the explosion engines in common use, and the explosion is equalized. As the cylinder and piston move in opposite directions it is obvious that the cranks are only required to be half Jmted States, residing ach cylinder is provided with a piston 15 which is connected by a pltman or 1 the length of the common engine of like cylinder capacity, thereby giving the piston only half as much travel as in the common engine. This arrangement enables the charge to be fired when the cranks are at or near their greatest leverage so that more power will be developed in the shorter crank than in the longer one of the common engine, be cause in the common engine the force of the explosion occurs when the crank is nearly on dead center and the leverage is very slight. An inlet ipe 17 runs from the carbureter or other el supply, not shown but of any standard make, to and terminates in a port 18 in one side of the frame. This port is normally closed by a valve. In the drawings I have shown a rotary sleeve valve 19 other, which in their revolution register with inlet port 23 and exhaust port 24 in the cylinder as hereafter explained. At the top of valve 19 are teeth 25 that are engaged by lugs 26 that are formed on upwardly extending arms 27, one on each side. There may be two or more of these lugs as desired. As the cylinder moves downwardly lugs 26 contact with teeth 25 and rotate the valve a predetermined distance. Valve 19 also has teeth 28 around the bottom thereof which are engaged by 'lugs 29 on the bottom portion of the cylinder, whereby when the cylinder is moving upwardly or outwardly from the crank teeth 28 are engaged by lugs 29 and the valve is rotated a certain predetermined distance. These teeth and lugs are so arranged and proportioned that a port 22 is brought into register with exhaust port 24 just before a port 22 is brought into register with inlet port 23. This arrangement enables the use of ports 22 to serve at one time as exhaust ports and at another time as inlet ports. While I have shown a rotary valve to control the inlet and exhaust it is obvious that other forms of valves may be used for that purpose, and I do not confine myself to the rotary form of valve. In the outer end of the cylinder is a conventional spark plug 30 whic to battery 31 so that at predetermined times a spark is produced inthe cylinder; normally the circuit of the battery is open.

is electrically connected Every second tooth at the top of the valve has extending portion 25 which contacts with arm 32 and thereby closes the battery circuit and produces a jump spark at the terminals of the spark plug in the well known manner. By suitable well known mechanism the position of arm 32 can be changed to advance or retard the time of the spark. Any other of the well known forms may be used to produce the spark'at the proper time in the cylinder.

Having described my invention I claim: 1. In an explosion engine, a frame, a crank shaft having a plurality of cranks mounted thereon; a cylinder mounted in said frame and movable toward and away from said crank shaft, said cylinder having ports therein, one or more connections from said cylinder to one or more of said cranks; a piston in said cylinder; a connection from said piston to a crank not connected to the cylinder; a rotary valve surrounding said cylinder and closing the ports therein, said v valve having ports adapted to register with the ports in the cylinder, but not movable longitudinally on the cylinder; means carried by said valve and coacting means carried by the cylinder to cause the ports of the cylinder and valve to register at predetermined times; an inlet chamber adapted to supply an explosive charge into said cylinder when certain of the ports of the valve said crank shaft;'said cylinder having an 1 inlet and an exhaust port therein; a rotary valve having teeth at the top and bottom thereof and ports therein, said ports being adapted to register at predetermined times with .the inlet and exhaust ports of the cylinder; lugs on said cylinder adapted to engage the teeth of the valve and rotate the same predetermined distances; means to supply an explosive charge into said cylinder; means to ignite such charge; and means to permit the exhaust gases to pass out of the cylinder.

In witness that I claim the foregoing I have hereunto subscribed my name this 4th day of November 1918.

THEoboRE D. ROBINSON. 

